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+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
+ *
+ * gimpimagecombobox.c
+ * Copyright (C) 2004 Sven Neumann <sven@gimp.org>
+ *
+ * This library is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+
+#include <gegl.h>
+#include <gtk/gtk.h>
+
+#include "libgimpwidgets/gimpwidgets.h"
+
+#include "gimp.h"
+
+#include "gimpuitypes.h"
+#include "gimpimagecombobox.h"
+#include "gimppixbuf.h"
+
+
+/**
+ * SECTION: gimpimagecombobox
+ * @title: GimpImageComboBox
+ * @short_description: A widget providing a popup menu of images.
+ *
+ * A widget providing a popup menu of images.
+ **/
+
+
+#define THUMBNAIL_SIZE 24
+#define WIDTH_REQUEST 200
+
+
+typedef struct _GimpImageComboBoxClass GimpImageComboBoxClass;
+
+struct _GimpImageComboBox
+{
+ GimpIntComboBox parent_instance;
+
+ GimpImageConstraintFunc constraint;
+ gpointer data;
+};
+
+struct _GimpImageComboBoxClass
+{
+ GimpIntComboBoxClass parent_class;
+};
+
+
+static void gimp_image_combo_box_populate (GimpImageComboBox *combo_box);
+static void gimp_image_combo_box_model_add (GtkListStore *store,
+ gint num_images,
+ gint32 *images,
+ GimpImageConstraintFunc constraint,
+ gpointer data);
+
+static void gimp_image_combo_box_drag_data_received (GtkWidget *widget,
+ GdkDragContext *context,
+ gint x,
+ gint y,
+ GtkSelectionData *selection,
+ guint info,
+ guint time);
+
+static void gimp_image_combo_box_changed (GimpImageComboBox *combo_box);
+
+
+static const GtkTargetEntry target = { "application/x-gimp-image-id", 0 };
+
+
+G_DEFINE_TYPE (GimpImageComboBox, gimp_image_combo_box, GIMP_TYPE_INT_COMBO_BOX)
+
+
+static void
+gimp_image_combo_box_class_init (GimpImageComboBoxClass *klass)
+{
+ GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
+
+ widget_class->drag_data_received = gimp_image_combo_box_drag_data_received;
+}
+
+static void
+gimp_image_combo_box_init (GimpImageComboBox *combo_box)
+{
+ gtk_drag_dest_set (GTK_WIDGET (combo_box),
+ GTK_DEST_DEFAULT_HIGHLIGHT |
+ GTK_DEST_DEFAULT_MOTION |
+ GTK_DEST_DEFAULT_DROP,
+ &target, 1,
+ GDK_ACTION_COPY);
+}
+
+/**
+ * gimp_image_combo_box_new:
+ * @constraint: a #GimpImageConstraintFunc or %NULL
+ * @data: a pointer that is passed to @constraint
+ *
+ * Creates a new #GimpIntComboBox filled with all currently opened
+ * images. If a @constraint function is specified, it is called for
+ * each image and only if the function returns %TRUE, the image is
+ * added to the combobox.
+ *
+ * You should use gimp_int_combo_box_connect() to initialize and
+ * connect the combo. Use gimp_int_combo_box_set_active() to get the
+ * active image ID and gimp_int_combo_box_get_active() to retrieve the
+ * ID of the selected image.
+ *
+ * Return value: a new #GimpIntComboBox.
+ *
+ * Since: 2.2
+ **/
+GtkWidget *
+gimp_image_combo_box_new (GimpImageConstraintFunc constraint,
+ gpointer data)
+{
+ GimpImageComboBox *combo_box;
+
+ combo_box = g_object_new (GIMP_TYPE_IMAGE_COMBO_BOX,
+ "width-request", WIDTH_REQUEST,
+ "ellipsize", PANGO_ELLIPSIZE_MIDDLE,
+ NULL);
+
+ combo_box->constraint = constraint;
+ combo_box->data = data;
+
+ gimp_image_combo_box_populate (combo_box);
+
+ g_signal_connect (combo_box, "changed",
+ G_CALLBACK (gimp_image_combo_box_changed),
+ NULL);
+
+ return GTK_WIDGET (combo_box);
+}
+
+static void
+gimp_image_combo_box_populate (GimpImageComboBox *combo_box)
+{
+ GtkTreeModel *model;
+ GtkTreeIter iter;
+ gint32 *images;
+ gint num_images;
+
+ model = gtk_combo_box_get_model (GTK_COMBO_BOX (combo_box));
+
+ images = gimp_image_list (&num_images);
+
+ gimp_image_combo_box_model_add (GTK_LIST_STORE (model),
+ num_images, images,
+ combo_box->constraint,
+ combo_box->data);
+
+ g_free (images);
+
+ if (gtk_tree_model_get_iter_first (model, &iter))
+ gtk_combo_box_set_active_iter (GTK_COMBO_BOX (combo_box), &iter);
+}
+
+static void
+gimp_image_combo_box_model_add (GtkListStore *store,
+ gint num_images,
+ gint32 *images,
+ GimpImageConstraintFunc constraint,
+ gpointer data)
+{
+ GtkTreeIter iter;
+ gint i;
+
+ for (i = 0; i < num_images; i++)
+ {
+ if (! constraint || (* constraint) (images[i], data))
+ {
+ gchar *image_name = gimp_image_get_name (images[i]);
+ gchar *label;
+ GdkPixbuf *thumb;
+
+ label = g_strdup_printf ("%s-%d", image_name, images[i]);
+
+ g_free (image_name);
+
+ thumb = gimp_image_get_thumbnail (images[i],
+ THUMBNAIL_SIZE, THUMBNAIL_SIZE,
+ GIMP_PIXBUF_SMALL_CHECKS);
+
+ gtk_list_store_append (store, &iter);
+ gtk_list_store_set (store, &iter,
+ GIMP_INT_STORE_VALUE, images[i],
+ GIMP_INT_STORE_LABEL, label,
+ GIMP_INT_STORE_PIXBUF, thumb,
+ -1);
+
+ if (thumb)
+ g_object_unref (thumb);
+
+ g_free (label);
+ }
+ }
+}
+
+static void
+gimp_image_combo_box_drag_data_received (GtkWidget *widget,
+ GdkDragContext *context,
+ gint x,
+ gint y,
+ GtkSelectionData *selection,
+ guint info,
+ guint time)
+{
+ gint length = gtk_selection_data_get_length (selection);
+ gchar *str;
+
+ if (gtk_selection_data_get_format (selection) != 8 || length < 1)
+ {
+ g_warning ("%s: received invalid image ID data", G_STRFUNC);
+ return;
+ }
+
+ str = g_strndup ((const gchar *) gtk_selection_data_get_data (selection),
+ length);
+
+ if (g_utf8_validate (str, -1, NULL))
+ {
+ gint pid;
+ gint ID;
+
+ if (sscanf (str, "%i:%i", &pid, &ID) == 2 &&
+ pid == gimp_getpid ())
+ {
+ gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (widget), ID);
+ }
+ }
+
+ g_free (str);
+}
+
+static void
+gimp_image_combo_box_changed (GimpImageComboBox *combo_box)
+{
+ gint image_ID;
+
+ if (gimp_int_combo_box_get_active (GIMP_INT_COMBO_BOX (combo_box),
+ &image_ID))
+ {
+ if (! gimp_image_is_valid (image_ID))
+ {
+ GtkTreeModel *model;
+
+ model = gtk_combo_box_get_model (GTK_COMBO_BOX (combo_box));
+
+ g_signal_stop_emission_by_name (combo_box, "changed");
+
+ gtk_list_store_clear (GTK_LIST_STORE (model));
+ gimp_image_combo_box_populate (combo_box);
+ }
+ }
+}